How to Install Java 1.8 on Ubuntu

Installing Java on your Ubuntu system is a straightforward process that can be completed in a few steps. This tutorial will guide you through the installation of OpenJDK 11, which is the latest LTS version of Java at the time of writing.

Before you begin, make sure your package index is updated by running the following command:

`sudo apt update`

Once the package index is updated, install the default Java OpenJDK package with:

`sudo apt install default-jdk`

This will install the latest version of OpenJDK available on your Ubuntu system. If you're using an earlier version of Ubuntu, such as 16.04, you can also install OpenJDK 11 using the same command.

Choosing Between Java Implementations

Ubuntu provides two main implementations of Java: OpenJDK and Oracle Java. While both implementations are functionally equivalent, Oracle Java has a few additional commercial features that may be useful for certain applications. For this tutorial, we will focus on installing OpenJDK 11, which is the default Java implementation available on Ubuntu 18.04.

Java Editions

Java is distributed in three different editions: Standard Edition (SE), Enterprise Edition (EE), and Micro Edition (ME). This tutorial covers the installation of the Java SE edition, which is suitable for most users.

Prerequisites

Before you can install Java, make sure you are logged in as a user with sudo privileges. The same instructions apply to Ubuntu 16.04 and any Ubuntu-based distribution, including Kubuntu, Linux Mint, and Elementary OS.

Installing OpenJDK on Ubuntu

To install OpenJDK 11 on your Ubuntu system, follow these steps:

1. Update the package index by running `sudo apt update`.

2. Install the default Java OpenJDK package with `sudo apt install default-jdk`.

That's it! You should now have OpenJDK 11 installed on your Ubuntu system. You can verify the installation by opening a terminal and typing `java -version`, which should display the version of Java you just installed.

Remember to always check for updates and upgrade your Java installation regularly to ensure you have the latest security patches and features.

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